IRF Datasheet, IRF MOSFET N-Channel Transistor Datasheet, buy IRF Transistor. ⑥ Uses IRF data and test conditions. Electrical Characteristics @ TJ = 25°C (unless otherwise specified). Parameter. Min. Typ. Max. Units. The following post explains the main features of mosfet IRF which It’s technical specifications may be understood with the following data.
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Sign up or log in Sign up using Google. I suspected the transistor to be broken, but I ifr3205 it out several times and the results were the same.
Thanks a lot, now the circuit works exactly as I wanted! However I build the exact same project some months ago and used the exact same parts – the same resistances, the same transistor type and the same valve and it worked perfectly with a 5V gate voltage. I built this circuit as part of an automatic irrigation system and I am not sure how high the gate voltage should be: When I connected the gate pin of the transistor directly to the 12V power source the circuit worked as intended and the valve opened.
My basic idea is that if the soil gets to dry the arduino sets the gate voltage, which turns the transistor on and the valve opens.
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IRF Datasheet(PDF) – International Rectifier
The arduino outputs 5V which is just over the threshold voltage of V Datasheet: I use a IRF transistor, which might be a bit of an overkill, but it was the smallest I had. Home Questions Tags Users Unanswered. Post as a guest Name. Try your circuit in this form: The LED is to easily see if the valve is open or closed.
Looking at the details in the datasheet you need to understand that the V GS is applied between the Gate and source of the N-Channel FET, you can look at Figure 1 to see the switching characteristics. The 5 volts seem to be to low to let enough current flow for the valve, datw drains around 2.
IRF3205 MOSFET. Datasheet pdf. Equivalent
I learned from another thread here that this makes sense, because a higher gate voltage will let more current flow through the transistor.
You cannot drive the IRF in the manner shown.